Health statistics from U.S. National Health Survey, series. B-13. Heart conditions and high blood pressure reported in interviews. United States July 1957-June 1958, statistics on prevalence of heart conditions and high blood pressure and days of disability due to these conditions by age, sex, and medical care status, based on data collected in household interviews during period July 1957-June 1958; [prepared by Robert R. Fuchsberg].

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